Best US Small Cap ETFs: Top Funds for High-Growth Potential
Three main indices serve as benchmarks for US small cap ETFs: the Russell 2000, the S&P SmallCap 600, and the CRSP US Small Cap Index. Each takes a different approach to defining and selecting small-cap stocks — companies typically valued between $300 million and $2 billion — which means the ETFs tracking them can behave quite differently.
The Russell 2000, launched in 1984 and maintained by FTSE Russell (a subsidiary of the London Stock Exchange Group), holds the smallest 2,000 stocks in the Russell 3000 Index. It represents roughly 10% of the Russell 3000’s total market capitalization and reconstitutes once per year in June. Its top sectors are industrials, healthcare, and financials. Unlike S&P 500 constituents that earn a large share of revenue internationally, Russell 2000 companies are more tied to the US domestic economy.
The S&P SmallCap 600, introduced in 1994 and managed by S&P Dow Jones Indices, is a narrower index of roughly 600 stocks. It applies stricter entry criteria: companies must demonstrate positive earnings in their most recent quarter and across the past four consecutive quarters combined. This profitability filter is a meaningful distinction — the Russell 2000 includes a much higher proportion of unprofitable companies.
The CRSP US Small Cap Index, tracked by Vanguard’s VB, holds around 1,350 companies and uses a more gradual rebalancing approach compared to the Russell 2000’s annual reconstitution.
- Industrials & financials: Both the Russell 2000 and S&P 600 tilt heavily toward industrial, financial, and consumer discretionary stocks.
- Lower tech weighting: US small cap indices carry far less information technology exposure than the S&P 500 or Nasdaq 100.
- Domestic focus: Small-cap companies generally earn most of their revenue inside the United States, making these funds more sensitive to the US economic cycle.
- Quality differences: The S&P 600’s profitability requirement has historically contributed to better risk-adjusted returns compared to Russell 2000-based funds.
Small-cap stocks sit in a distinct category from small-cap companies globally and tend to carry more volatility than their large-cap counterparts, particularly during market downturns.
Regulated brokerThe table below lists the leading US small cap ETFs by assets under management and tracks their live performance across different timeframes.
| Stock | Price | Change % | 52 Week Range |
|---|---|---|---|
| $119.65 | 1.44% | ||
| $94.16 | 3.01% | ||
| $4,985.84 | 1.19% | ||
| $57.81 | 1.14% | ||
| $73.65 | 2.41% | ||
| $106.05 | 1.29% | ||
| $48.60 | 1.70% | ||
| $257.23 | 2.32% | ||
| $120.41 | 1.92% |
